Hi to all! The conventional procedure to compute the aerodynamic coefficients for an airfoil is to define the airfoil as a solid stationary wall, and define an incoming velocity at different angles of attack in the far field. I have been trying something a bit different, leave the conditions in the far field with 0 m/s, and instead, define the airfoil as a moving solid boundary, using a velocity in the opposite direction. I was hoping to find, instead of the always "normal" streamlines along the profile, the real flow fiel of an airfoil as it moves through a stationary fluid. Although the relative "velocity" between fluid and body remains the same, the values for lift and drag are completely different (and obviously false for the case of the moving boundary).

I´m trying this as a preliminary simulation of the interaction of two bodies with a relative velocity, so I wanted to leave one of them stationary, and give the other one a relative wall velocity, but if it doesn´t even work for the airfoil, then I must be doing something wrong :)

Does anybody have any idea to this? Thank you!

Best regards,

Alejandro

dingxi wang

February 18, 2007 15:43

Re: Airfoil simulation using moving wall

I think you need to use a moving mesh,insteady of a moving airfoil. Otherwise, the airfoil will move out of your computational domain.

Davide

July 6, 2007 09:08

Re: Airfoil simulation using moving wall

I have the same problem with a simulation of the effects on the antinoise barriers caused by passing train. I use COMSOL. Can someone help me ?

RISHI KUMAR SHUKLA

July 10, 2007 07:40

Re:centrifugal pump simulation using moving wall

i have the problem in makin moving mesh arround the impeller blades .

i need help in this problem

mahesh kamble

February 14, 2008 10:38

Re:centrifugal pump simulation using moving wall

What is your problem As i m working on CFD simulation of pump i may help you

subhani

February 21, 2008 06:39

Re:centrifugal pump simulation using moving wall

good evening sir my name is subhani iam studying btech finel year in a.p, sir i want some caluclation about this pump because ia m working in project please give me a solution of the simulation of centrifugal pump

thank you sir

yours faithfully,,,,

Rajiv Kaul

June 2, 2008 00:44

Re:centrifugal pump simulation using moving wall

Sir,

I am facing problem in designing pump casing for min SA and stress analysis by FEM. If you can help me please send relavent material. with regards, yours, RKaul

Nasir Atta

October 27, 2008 02:49

Re:centrifugal pump simulation using moving wall

Hi: I hope you are doing well.Actually I need to buy a simulator for Naval traning purposes. It should have operating, maintinace skills for centerfugal pumps connected serially and parallel, includng measuring equipments, mesters, valves, water tank fixed on holder with covers. Power suppy 220 volt. If you can get me simulator or even tell me where I can buy is from it will be a great help. Best regards. Nasir Atta

Nasir Atta

October 27, 2008 02:51

Re:centrifugal pump simulation using moving wall

Hi: I hope you are doing well.Actually I need to buy a simulator for Naval traning purposes. It should have operating, maintinace skills for centerfugal pumps connected serially and parallel, includng measuring equipments, mesters, valves, water tank fixed on holder with covers. Power suppy 220 volt.If you can help me with it or even tell me where I can buy it from I will be very thankful. Best regards Nasri Atta.

Rajiv Kaul

November 4, 2008 03:00

CFD and centrifugal pump

Sir, I wish to have a software which could help me in designing cavitation free centrifugal pump. If you could help me please send. with regards, R Kaul